import confetti from 'canvas-confetti';
import { defineStore } from 'pinia';
import { ref } from 'vue';
import { useSoundEffects } from '../composables/useSoundEffects';
import { apiClient } from '../services/api/client';
import { useAuthStore } from './auth.store';

export interface PrizeResult {
  id: string;
  title: string;
  segment: number;
  code?: string | null;
  type: string;
  image?: string | null;
}

export const useSpinStore = defineStore('spin', () => {
  const authStore = useAuthStore();
  const { playWin, playNoPrize } = useSoundEffects();

  const isRequesting = ref(false);
  const isWheelSpinning = ref(false);
  const targetSegmentIndex = ref<number | null>(null);
  const spinResult = ref<any>(null);
  const showResultModal = ref(false);
  const errorMessage = ref<string | null>(null);
  const pendingIdempotencyKey = ref<string | null>(null);

  function generateIdempotencyKey(): string {
    if (typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function') {
      return crypto.randomUUID();
    }
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
      const r = (Math.random() * 16) | 0;
      const v = c === 'x' ? r : (r & 0x3) | 0x8;
      return v.toString(16);
    });
  }

  async function executeSpin(campaignId: string, segments: any[]) {
    if (isRequesting.value || isWheelSpinning.value) return;

    if (!authStore.isAuthenticated) {
      errorMessage.value = 'لطفاً ابتدا وارد حساب کاربری خود شوید.';
      return;
    }

    if (authStore.chances.remainingChances <= 0) {
      errorMessage.value = 'شما شانس کافی برای چرخاندن گردونه ندارید!';
      return;
    }

    isRequesting.value = true;
    errorMessage.value = null;

    if (!pendingIdempotencyKey.value) {
      pendingIdempotencyKey.value = generateIdempotencyKey();
    }

    try {
      const res = await apiClient.post(`/campaigns/${campaignId}/spin`, {
        idempotencyKey: pendingIdempotencyKey.value,
      });

      const data = res.data;
      spinResult.value = data;

      // Update remaining chances from server
      if (typeof data.remainingChances === 'number') {
        authStore.setRemainingChances(data.remainingChances);
      } else {
        authStore.decrementChance();
      }

      // Find the segment index in the client segments list
      let segIdx = 0;
      if (data.prize) {
        // Priority 1: Match strictly by prize id first
        let found = segments.findIndex((s) => s.id === data.prize.id);

        // Priority 2: Fallback match by exact title
        if (found === -1 && data.prize.title) {
          found = segments.findIndex((s) => s.title === data.prize.title);
        }

        // Priority 3: Fallback match by sortOrder / segment
        if (found === -1 && data.prize.segment !== undefined) {
          found = segments.findIndex((s) => s.sortOrder === data.prize.segment);
        }

        segIdx = found !== -1 ? found : 0;
      }

      targetSegmentIndex.value = segIdx;
      isWheelSpinning.value = true;

      // Clear the idempotency key once successfully acknowledged by server
      pendingIdempotencyKey.value = null;
    } catch (err: any) {
      let msg =
        err.response?.data?.message ||
        (Array.isArray(err.response?.data?.message)
          ? err.response?.data?.message.join(' - ')
          : 'خطا در ارتباط با سرور گردونه شانس');
      if (typeof msg === 'string') {
        if (msg === 'CAMPAIGN_DRAFT') {
          msg = 'این گردونه شانس در حال آماده‌سازی است و هنوز فعال نشده است.';
        } else if (msg === 'CAMPAIGN_PAUSED') {
          msg = 'این گردونه شانس موقتاً متوقف شده است.';
        } else if (msg === 'CAMPAIGN_NOT_STARTED') {
          msg = 'زمان شروع این گردونه شانس هنوز فرا نرسیده است.';
        } else if (msg === 'CAMPAIGN_FINISHED') {
          msg = 'مهلت شرکت در این گردونه شانس به پایان رسیده است.';
        }
      }
      errorMessage.value = msg;
    } finally {
      isRequesting.value = false;
    }
  }

  function onWheelAnimationFinished() {
    isWheelSpinning.value = false;
    targetSegmentIndex.value = null;

    const prize = spinResult.value?.prize;
    const isNoPrize = !prize || prize.type === 'NO_PRIZE' || prize.title?.trim() === 'پوچ' || prize.title?.includes('پوچ');

    if (!isNoPrize) {
      playWin();
      // Confetti burst
      confetti({
        particleCount: 80,
        spread: 70,
        origin: { y: 0.6 },
      });
    } else {
      // Play famous iconic Sad Trombone losing sound
      playNoPrize();
    }

    showResultModal.value = true;

    // Trigger SMS notification now that the wheel stopped and the modal is visible
    if (spinResult.value?.spinId) {
      apiClient.post(`/campaigns/spins/${spinResult.value.spinId}/notify`).catch(() => {});
    }
  }

  function closeResultModal() {
    showResultModal.value = false;
    spinResult.value = null;
  }

  return {
    isRequesting,
    isWheelSpinning,
    targetSegmentIndex,
    spinResult,
    showResultModal,
    errorMessage,
    executeSpin,
    onWheelAnimationFinished,
    closeResultModal,
  };
});